1661472414799 has 2 divisors, whose sum is σ = 1661472414800. Its totient is φ = 1661472414798.

The previous prime is 1661472414691. The next prime is 1661472414809. The reversal of 1661472414799 is 9974142741661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1661472414799 - 2²⁹ = 1660935543887 is a prime.

It is a super-3 number, since 3×1661472414799³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1661472414499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830736207399 + 830736207400.

It is an arithmetic number, because the mean of its divisors is an integer number (830736207400).

Almost surely, 2^{1661472414799} is an apocalyptic number.

1661472414799 is a deficient number, since it is larger than the sum of its proper divisors (1).

1661472414799 is an equidigital number, since it uses as much as digits as its factorization.

1661472414799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18289152, while the sum is 61.

The spelling of 1661472414799 in words is "one trillion, six hundred sixty-one billion, four hundred seventy-two million, four hundred fourteen thousand, seven hundred ninety-nine".